[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/sealab_2020_7890.jpg]]
[[caption-width-right:350: Most of the primary cast (Ed, Gail, Murphy, Paul, Hal]]

A short lived Creator/HannaBarbera cartoon, airing in the winter of 1972. The show followed the exploits of the crew of Sealab, an underwater research station devoted to studying, exploring, and protecting underwater marine life. The show had a short run, with only 13 episodes aired (and three left unfinished).

The show wasn't well remembered except for occasional early morning repeats on Cartoon Network, before the burgeoning program block Creator/AdultSwim took it in BroadStrokes to create ''{{WesternAnimation/Sealab 2021}}''.
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!!Tropes featured in this show:

* AllAnimalsAreDogs: As Hal said "basking sharks are like the puppies of the ocean."
* ColorCodedCharacters: As listed below the wet suit the characters wear are color coded by position.
* DistressedDamsel / DistressedDude: Bobby and Salli need to be rescued in the pilot
* DrivenToMadness: Due to green fever, a minor character tries to sabotage Sealab
* FamilyUnfriendlyViolence: One episode deals with a hunter tracking and trying to kill a whale.
* GreenAesop: More often than not.
* HeelFaceTurn: Several examples to put over the GreenAesop.
* ItWasHereISwear: Nobody at first believes Gail when she sees the giant squid.
* LimitedAnimation: Like most cartoons of its era.
* LimitedWardrobe: Since the show takes place in an undersea base, it's sort of a JustifiedTrope. Every one wears a diving suit (orange for scientist, blue for other job, yellow for student)
** Slightly subverted when each characters get a helmet when they so diving.
* NoNameGiven: A good chunk of the other workers in Sealab.
* UnderwaterBase[=/=]UnderwaterCity: Sealab, of course.
* WhatHappenedToTheMouse: There are clearly lots of workers in Sealab but outside of the primary cast most only get shown in one episode to never be mentioned again.
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